Spindle-bearing for multiple-spindle metal-working machines.



E. L. GONE. 0R MULTIPLE SPINDLE METAL woRKlMe M APPLlCATlON FILED FEB.B,1915.

ACHNES.

SPINDLE BEARING F maag@ Patented 32111.11, 1916.

2 SHEETS-SHEET l.

/nesseer Ma/W 707i? Zlfo F. L. GONE. FOR MULTIPLE SPINDLE METAL WORKINGY MACHINES.

SPINDLE BEARING APPLICATION FILED FEB. 8, I9I5.

Patented Jan. 11, 1916.

2 SHEETS-SHEET 2.

SQ QN.

FRANK L. GONE` OF WINDSOR, VERMONT, ASSIGNOR T0` WINDSOR MACHINE COMPANY,

. OF WINDSOR, VERMONT, A CORPORATION F VERMONT.

SPINDLE-BEARING FOR MULTIPLE-SPINDLE METAL-WORKING MACHINES. i

l ,168.249, Specification 0f Letters Patent Patented Jan. il, i916. Application led February 8, 1915. Serial No. 6,877.

T 0 all Iwhom it may concern v and the cost of manufacture of the machines Be it.known that I, FRANK L. Conn, a and consequently increases the cost to the citizen of the United States, and resident of ultimate user. s

lllindsor, in the county of Windsor and The obje-ct of the present invention is to State of Vermont, have inventedv certain provide a machine of this character with 60 new and useful Improvements in Spindleimproved bearings for the spindle so that Bearings for Multiple-Spindle Metal-VVOrkthe bearing which is called upon to resist ing Machines, (Case -A,) of which the folthe end thrust is widely separated from that lowing is aspeciication. employed for resisting lateral thrust, in con- This invention has relation to metal-worksequence of which the load is distributed to ing machines of the multi-spindle type, in widely separated or remote bearings, thereby which the work-carrying spindles are decreasing the friction on either end, and iournaled in a rotatable turret which is the generation of heat which would act still rotated with a step-by-step movement so as further to increase the friction by expandto bring the pieces of work successively to ing the engaging parts. 70

the several tools which are to operate It is highly undesirable to increase the thereon. In such machines it is necessary diameter of the turret or the diameter or to rotate the spindles at various speeds acthickness of the turret bearing, because of cording to the character of the cut to be the increased Weight of the machine, and iliade, and it is of the greatest importance yet, as explained, it is most desirable that that they 'should be so mounted and supthe spindle bearings should be large in ported as to hold the work rigidly against diameter'. In accordance with the present yielding under the various strains to which invention, the work spindles are journaled it is subjected during the cutting operation. in bearings which are located outside of the These strains are either lateral, as in the transverse vertical planes of the turret bearoperation of forming or cutting olf, or longiing, as a result of which the bearings may tudinal or endwise of the spindle, as. in the be greatly increased in diameter. Further case of drilling; and at times the strains are more, ythe bearings are so arranged and rebotli longitudinal and lateral as in the case lated to the spindle that the bearings which of turning, or when two operations are being resist the rear end thrust are not called upon performed, such as forming and drilling. to withstand-the lateral thrust of the spindle, l These diverse strains and thrusts upon. the whereas the bearings which resist the lateral spindles must be resisted by the bearings in thrust are not called upon to resist end thrust the turret in which the spindles are mounted, in either direction. By arranging the bearand when the spindles are -iournaled in .the ings outside of the transverse vertical planes ordinary friction bearings the latter soon of the turret bearing, I am able to support become worn and allovsT the work to yield the spindle at more widely separated points and thus prevent a perfect operation. than would otherwise be possible. thus in- VVhere a single bearing is called upon to creasing the stability of control.

resist not only a longitudinal thrust but also On the accompanying drawings I have a5 a lateral thrust, the friction increases beillustrated a multiple-Spindle metal-WOIkcause of the cumulative action due to the ing machine in which the invention is emexpansion of the bearing by the heat. This bodied but to which, however, theinvention heat, furthermore, is conducted to the is not limited.

spindle and causes a perceptible expansion .Referring to the said drawings: Figure l 10o and displacement of the work with reference represents a plan view of the machine reto the cutter. Machines of this general ferr-ed to. Fig. 2 represents a longitudinal character, even when constructed for opersection through the turret. Fig. 3 repreating upon relatively small work, say l in sents an enlar ed section through the front diameter, are necessarily large, heavy and end of one of tie spindles and illustrates the cumbersome. It is important that the beartaper bearing. Fig. 4 illustrates another ings should be large in diameter so as to reform of bearing which may be utilized for sist the lateral strains; but to make them the rear end of the spindle in lieu of a taper larger than is required for resisting the bearing. Y. y lateral thrust materially increases the weight It is unnecessary to describe in detail the im there is securedl removably by bolts or other general features of the machine which is illustrated upon the drawings, as it does not differ materially from that illustrated in the patent to George Otis Gridley, No. 904,866, datedfNovember 24, 1908. It may suiice to state that the machine is provided with a turret. bearing` 10 in which the turret isv journaled, said turret being formed with an extension 11 on which is mounted the slidable 'tool holder 12. By suitable means the turretis indexed to feedjthe work step by step to the tools on the toolslide. The tool slide is fed by mechanism actuated by a feed or drum shaft l13. These partsare all described i-n detail in the said patent.

'l'he turret bearing 1() is provided with two internal iianges 14e, 14 which are sepa-A rated as shovn in Fig. 2, and in which is mounted the turret which is indicated at 1'5 and which is provided with the extension 11 previously referred to. The turret is formed or provided with separated peripheral flanges 16, 16 which are internal flanges orv bearings'le of the main turret bearing 10. r1`he turret'anges 16 are apertured to receive the spindles which are indicated at 17. It will be unnecessary to describe allthe features of construction of the spindle, it suiiicing to state that each is provided with a suitable stock-feeding mechanism. On one end lface of the turret suitable fastenings a disk 18 which is aper- .tured so as to fit snugly upon the turret ex This disk is of greater diame,`

order to permit the turret to be inserted into or withdrawn endwise from its bearing in the main frame of the machine.

Keyed upon therear end of each spindle there is a gear 119 to which power is ap- .plied from a centrally located gear 120 mounted on a shaft 21 for the purpose of imparting rotation thereto. In Fig. 2 I have illustrated the spindle as being mounted in taper bearings, which I find advantageous to .use because of their capacity for adjustment to compensate for wear. The two disks 18 and 19 are apertured to receive loosely the spindle, as indicated at 220 and 221, and they are also formed with cups 22, 23 to receive the.y taper bearings. I will describe irst the taper bearing for the front end of the spindle.- This'consists of two sleeves, 24, 25,-the outer stationary sleeve mounted in the messes 24 having an internal taper and the sleeve 25, which may be of hardened steel, being tapered externally and ground, if desired, to fit therein. r1`he end of the sleeve 21- abuts against the bottom oij the cup or socket 22- and is held against rotation. The outer end of the sleeve 25 is engaged by the spindle nose 26 which is screwed upon the end of the spindle, and the inner end of the sleeve 25 abuts against a shoulder 26 formed on the spindle, so that said .sleeve rotates with the spindle relatively to the outer sleeve 2l. t the opposite end of `the spindle I utilize like taper bearings comprising an outer sleeve 28 andan inner sleeve 29. The outer sleeve has an internal ,taper and is also shouldered at 30 to bear against the end face of the disk 19. The externally tapered sleeve 29, which is keyed upon the spindle, is shown as formed on the gear 119. r1`he gear 119 is socketed, as at 31, to receive a collar 32 which is threaded upon the spindle. The two taper bearings are oppositely arranged, as shown, so that by adjusting the collar-32 the tapered sleeves 2 4 and 25, and 26 and' be respectively adjusted, 'simulta' 27, will neously, to compensate for wear. It will be noted from the drawings that these bearings extend diametrically or radially outwardly from the center of the turret beyond they bearing faces of the flanges 1l of the turret bearing, this being permitted by the fact that they may be located in transverse vertical planes beyond the end of the turret bearing. These two taper bearings are called upon to resist only lateral thrust of the spindle, separate bearings being utilized to resist end thrust. To resist the rearward end thrust I place upon the spindle a-sleeve 33 which has a shoulder 84 abutting against the inner face of the turret flange 16. This sleeve has a relatively large end' face 35 against which is the confronting face of the collar 36 which is splined upon the spindle. An adjusting nut 37 screwed upon the spinvdle engages the collar 36 and is held in place by a locknut 38. The sleeve 33 is provided with an internal socket 39 to receive oil; but as the feature of oiling comprises no part of the present invention'` I will not describe how the oil is fed thereto. For the purpose of holding the spindle against forward thrust I employ a collar #l0 which bears against the inner face of the turret Harige 16 at the front end ofthe turret and which is pinned thereto as at -il-l so as to hold it against rotation. Screwed upon the spin dle are the adjusting nut -12 and the locklng nut -13 therefor. and between the nut 42 and the collar l0 there is shown a washer '44. yBy these two end-thrust bearings which I havel'thus described, the spindle may beheld against endwise movement. In view of the fact that the major end thrusts are toward the rear of the spindle,

Vinto the cup as thrust they will mosaic to which oil is supplied from the cavity 39 through the groove 45 in the face of the sleeve 33.

1 have shown in Fig. l a lateral thrust bearing for the spindle which is of the antifriction type. This comprises the inner race 50 which is held against the shoulder 51 on the spindle by'the hub 52 of the gear 119. The outer race 53 is located in the cup or socket in the disk 19 and may be adjusted relatively thereto by a collar 54 screwed shown. The balls are indicated at 55, and they are separated by the usual cage or separator 56. The two races, 50, 53, are co-mplemental and may -be so formed that in addition to resisting lateral also resist the rear end I do not herein, however, specifically claim a construction utilizing ball bearings,as that is set forth and claimed in my copending application, Serial No. 6,878, filed concurrently herewith. v

It has been common practice in lathes and screw machines to make the spindle with a peripheral flange on the end next thespindle nose, which necessitated constructing the spindle of a forging. In the present case, the spindle may be made of a straight tubular bar which can be obtained in quantities commercially, and which can be turned to the form shown, in consequence of which I am able to make a material saving in the cost thrust.

,of construction. The 'durability of the spindle is increased by employing hardened steel sleeves or bushings as at 25 and 29, which may be ground on their bearing surfaces. Between the bearing surfaces of the coperating sleeves 24 and 25, and 29 and S0 may be placed tapering bushings of bearing metal as shown. Ordinarily, were the spindle mounted in bearings such as described, the rearward strains on the spindle would cause it to increase the friction and to stick, but this is overcome in the present case by utilizing the end thrust bearing located between the taper bearings and held against movement by the rear peripheral flangey of the turret. Hence it is possible to operate the spindle under forced conditions, and, should it become overheated to such an extent as to heat the end thrust bearing, the front and rear taper bearings would not be affected, since they are remote from the end thrust bearing. If the heat engendered by the friction of the end thrust bearing were sufticient to expand the spindle lengthwise, the taper bearings would be loosened (instead of being tightened) and the spinde would continue to rotate freely. Thus I am able to provide for a successful operation of the .spindle under all conditions.

'Having thus explained thev nature of my said invention and described a way of constructing and using the same, although without attempting to set forth all the forms in which it may be made or all the modes of its use, what I claim is:

1. In a multi-spindle machine, a frame having a turret bearing, a turret journaled in said bearing, spindles passing through said turret in parallelism with the axis thereof, and bearings for said spindles supported by said turret and located beyond the ends of the turret bearin whereby said spindle bearings may be o relatively large diameter.

2. In a multi-spindle machine, a frame having a turret bearing,-`a turret ]ournaled in said bearing, spindles passing through said turret in parallelism with the axis thereof, end extensions formed on or secured to said turret, projecting beyond the turret bearing and of greater diameter than the turret, and spindle bearings mounted in said extensions in parallelism with the axis of the turret.

3. In a multi-spindle machine, a frame having a turret bearing, a turret journaled in said bearing, spindles passing through said turret in parallelism with the axis thereof, end extensions or disks formed on or secured to said turret and being located beyond the turret bearing and of greater diameter than the turret, said extensions or disks having cups or sockets formed in the outer faces thereof, and spindle bearings arranged in said cups or sockets.

4. In a multi-spindle machine, a frame having a turret bearing, a turret journaledv in said bearing, spindles passing through said turret in parallelism with the axis thereof, end extensions on said turret beyond the turret bearing, and having apertured cups or sockets in the outer' faces thereof, and taper bearings for the spindles located in said cups or sockets.

5. The combination Withwork spindles and a turret having sockets in the end faces thereof, of lateral thrust bearings for said spindles, comprising internally tapered sleeves in said sockets and abutting against the end wana thereof, said sleeves flaring outwardly in opposite directions, and complemental externally and inwardly tapering sleeves, and end thrust bearings for said spindles bearing against said turret independently of the-said sleeves.

6. The combination with a spindle and a main support having front and rear flanges, of lateral thrust bearings for said spindle, comprising internally and outwardly tapered sleeves, mounted in said flanges, complemental internally but inwardly tapering sleeves secured to said spindle and rotatable in the first-mentioned sleeves, a rear end thrust bearing for the said spindle held against movement by the rear flange independently of said sleeves, A

' at the opposite ends of' said spindle and tapering toward each other, means on said spindle for holding said sleeves against outward endwise movement. complemental internally tapered bearing sleeves in which the first-mentioned sleeves arerespectively journaled, separated supports .for said internally tapered sleeves, and end thrust bearings loated between said taper bearings independent thereof and remote therefrom for holding the spindle .against endwise movement.y

8, In a multi-spindle machine, the combination with a turret having remotely separated peripheral flanges at the ends thereof, ot' lateral thrust bearings supported by said flanges, spindles journaled in said bearings,

and a rear end thrust bearing for each spindle located between sald flanges and abutting agalnst the rear perlphe'ral flange of' the turret independently of' said lateral thrust bearings. l

9. In a multi-spindle machine, the combination with a turret having remotely separated peripheral flanges at the ends thereof', of' lateralv thrust bearings supported by said flanges, spindlesjournaled in said bearings, a rear end thrust bearing for each spindle abutting against the rear Iwripheral flange ot' the turret. and a front end thrust bearing abutting against the front peripheral flange of' said turret.

10. .ln a muti-spindle machine, the combination with a turret having at its ends remotely separated flanges or bearing supports. of' a plurality of spindles, lateral thrust bearings tor said spindles mounted in said flanges or supports, sleeves bearing against the inner face of the rear flange or support. collars splined on the several spindles and vabutting against said sleeves, and means on said spindlesA for adjusting the collars thereon.

ll. The con'ibination with separated supports, of' a spindle, a taper bearing for the front end of the spindle comprising an internally tapered sleeve bearing against one of said supports and a complemental sleeve or bushing tapered toward the rear end of the spindle and bearing against a shoulderon the spindle, and an end thrust bearing for the spindle held against axial movement by the other of said supports.

12. The combination of a straight spindle having a cylindrical periphery with' areduced front end forming a shoulder, an externally and rearwardly tapering bushing on the front end of the spindle having its ends abutting against said shoulder, an internally and forwardly tapering sleeve arranged ito receive said externally tapered bushing. a support for said last-mentioned sleeve, means on said spindle for clamping the externally tapering bushing against said shoulder, and means independent 4of said bushings for holding said spindle against endwise movement under axial stresses.

13. The combination with a straight cylindrical spindle having a reduced t'ront end which forms 'a shoulder, of complementally tapered sleeves. ot' which the inner sleeve is on said reduced end of' the spindle and abnts against said shoulder, means for securing said last-mentioned sleeve to said spindle to rotate therewith. complementally tapered sleeves for the rear end of the spindle, the

-inner sleeve of which is adjustably splined on the spindle. said inner sleeves ltapering toward each other. means for rigidly supporting the outer sleeves so that the inner sleeves may rotate therein with the spindle, and a collar in threaded engagement with the spindle and engaging the inner rear sleeve, and arranged by its adjustment to cause the axial adjustment of' the spindle and inner sleeves relatively` to the outer sleeves. y

1l. The combination with separated front and rear supports and lateral thrust bearings therein. of' a spindle mounted in said bearings, of a rear end thrust bearing between said supports and abutting against said rear support for resisting rearward endwise thrusts of the spindle, a front end thrust bearing between said supports and abutting against the front support, and end thrust collars secured on said spindle, complemental to and engaging said end thrust bearings, whereby said spindle is held against endwise movement independently of the lateral thrust bearings.

In testimony whereofl I have aflixed my signature, in presence of' two witnesses.

i FRANK L. GONE. lVitnesses (ino. O. GRIDLEY,

IsArILL R. GAMASH. 

